author: harold l levin

... mantle plume has penetrated the lithosphere and crust and provides a conduit for much molten mantle-derived magma ... source of organic substances for its nutrition and energy. Holocene A term ... deep-seated mantle plume brings molten material ...

... and that each animal group's fossil ancestors would be found in underlying beds . Today , geologists accept that both uniformitarian- ism and catastrophism operate on our planet . Unifor- mity prevails in day - to - day geologic ...